NCO 23 has a requirement for IV Prep Computers in support of VISN 23. Â This is a total SB set aside. Â FOR CONSIDERATION ALL QUESTIONS MUST BE RECEIVED 72 HOURS BEFORE DATE STIPULATED IN BLOCK 8 OF T... NCO 23 has a requirement for IV Prep Computers in support of VISN 23. Â This is a total SB set aside. Â FOR CONSIDERATION ALL QUESTIONS MUST BE RECEIVED 72 HOURS BEFORE DATE STIPULATED IN BLOCK 8 OF THE SF1449 FORM. EMAIL ALL QUESTIONS AND RESPONSES TO jennifer.Watkins-schoenig@va.gov and joshua.Imdacha@va.gov